New Holland 3358 – ECM: CAN Transmit Timeout

The Engine Control Module (ECM) has failed to transmit data onto the Controller Area Network (CAN bus) within the expected timeframe. This indicates a failure in the communication process, affecting the system's ability to send or receive data through the CAN bus. This disruption can affect the operation of the entire vehicle, as other modules rely on information from the engine.

• T8.275
• T8.330
• T8.360
• T8.390
• T8.420
• Magnum 235
• Magnum 340
• Steiger 500 HD

1. 1

   Verify that the battery is fully charged and that the charging system is functioning correctly

2. 2

   Inspect all battery cables, ground straps, and connections for tightness and the absence of corrosion, and ensure the main chassis ground is clean and secure

3. 3

   Check all relevant fuses and relays, particularly those related to the ECM and other primary controllers

4. 4

   Visually inspect the CAN bus wiring harness for physical damage, chafing, pinching, or corrosion, especially near the ECM

5. 5

   Disconnect, inspect, and reseat the main electrical connectors at the ECM and other major controllers (transmission, armrest module) looking for bent or corroded pins

6. 6

   Measure CAN bus resistance with power off across CAN High and CAN Low (should be approximately 60 Ohms; 120 Ohms indicates an open circuit or missing resistor; significantly lower than 60 Ohms indicates an additional resistor or short circuit)

7. 7

   Measure CAN bus voltages with ignition on and engine off (CAN High to ground should be 2.5 to 3.0 Volts; CAN Low to ground should be 2.5 to 2.0 Volts; incorrect voltages can point to a short to power/ground or a faulty controller)

1. 1

   Address basic electrical issues

   Correct any low voltage or grounding issues found during initial checks. Charge or replace batteries and clean all primary power and ground connections. Clear the fault code and see if it returns.

2. 2

   Isolate faulty wiring area

   If the resistance check reveals 120 Ohms, use a wiring diagram to identify the location of the CAN bus terminating resistors (often one near the ECM and one in the cab). Check the wiring and connectors between these two points for an open circuit.

3. 3

   Isolate controllers

   If wiring appears intact, disconnect controllers from the CAN bus one at a time and re-check bus resistance and voltage. If disconnecting a specific module causes the bus resistance or voltage to return to normal, that module or its connector is the source of the problem.

4. 4

   Check the ECM

   If all wiring and other controllers appear to be in good order, the ECM itself is the primary suspect for the transmit timeout. Exhaust all possibilities of wiring or connection faults before replacing the ECM.